How to Use a Grease Gun Properly? - Toolspicks- hand pump grease gun pressure ,24/6/2021· Pump a small amount of grease through the nozzle. Before attaching the nozzle, make sure the grease that you just pumped out, is cleaned. Tighten the cap that you removed earlier. You need to push down the air bleeder so that it can force out the air. If the air is released, the grease gun will have stable pressure.Hand Grease Gun Pump - GZ Industrial SuppliesHand Grease Gun Pump. Extra-heavy-duty pistol grip grease gun. Cast head design. Jam proof handle return mechanism. Develops up to 1500 psi. Includes both whip hose with coupler and a rigid tube. Variable stroke/pressure design. The gun is easy to use, easy to clean, and makes greasing our equipment a much more enticing job! ×.